A smart SD card and its control system and method

Abstract

The invention discloses a smart SD (secure digital memory card) and a control system and a control method thereof. The control system comprises the smart SD and a client side controller. The client side controller sends an equipment authentication request to the smart SD according to an access password input by a user, and sends an access password setting or updating request to the smart SD according to the equipment authentication success message returned by the smart SD. The smart SD performs equipment authentication to the client side according to the received equipment authentication request, and returns the equipment authentication success message to the client side control device after the equipment authentication is passed, and further sets a new password or updates the old password for the user according to the received access password setting or updating request. Data security is guaranteed while production cost is increased slightly as compared with that of the common SD, and thus the smart SD is easy to be accepted by the user and the integral cost performance thereof is improved.

Description

technical field [0001] The present invention relates to a secure digital card (referred to as SD card, Secure Digital Memory Card) technology, in particular to an intelligent SD card and its control device and method. Background technique [0002] As a data storage carrier with small size and large capacity, SD card is widely used in portable electronic devices, such as digital cameras, smart phones and personal digital assistants (PAD, Personal Digital Assistant). SD cards store a large amount of personal information of users, and as information leakage incidents intensify, information protection has gradually become a major concern of ordinary consumers. [0003] SD card products currently used as data storage carriers can only provide simple data protection functions. For example, the SD card is locked by a switch to prohibit the SD card data from being written or read; or the memory partition method is used to control the access password of some fixed memory areas; or a...

AI Technical Summary

Problems solved by technology

[0006] (1) Some smart SD cards need to verify the personal identification number (PIN, Personal Identification Number) during use, so the SD card cannot be shared by multiple users, for example, as a company asset, data cannot be transferred between multiple users; With PIN protection, it cannot be used in non-smart devices, such as digital cameras, etc.

This solution reduces the scope of use of the SD card as a data carrier

[0007] (2) In some smart SD card implementation schemes, some large files cannot be written to the SD card under the same card capacity due to the setting of the normal area and the protected area.

[0008] (3) Some smart SD card implementations require access to two memories, resulting in a substantial increase in production costs (almost doubling the cost)

[0009] (4) Due to the fixed and single encryption method of some smart SD cards, all data information will be leaked after the algorithm is broken or the key is leaked

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